.box {
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    background: #369;
    align-items: center;

    .form {
        width: 500px;
        height: 300px;
        align-items: center;
        display: flex;
        justify-content: center;
        border: 1px solid #fff;
    }
}